whisky vs hard drink

whisky and hard drink both are nouns.

Word	Noun	Adjective	Verb	Adverb
whisky	Yes	No	No	No
hard drink	Yes	No	No	No

As nouns, hard drink is a hypernym of whisky; that is, hard drink is a word with a broader meaning than whisky:

Other hypernyms of whisky include booze, hard liquor, John Barleycorn, liquor, spirits, strong drink.

whisky (noun)	hard drink (noun)
a liquor made from fermented mash of grain	an alcoholic beverage that is distilled rather than fermented